Los Olvidados (Mexico, 1950)
Social realism at its best, but not played straight by any means (the dream sequence is incredible and the creepiest use of slow-motion this side of 'Throne of Blood'). It scooped Best Director at Cannes. Also my emotional involvement in this film was significant - let's leave it at that.
The Devils (UK, 1971)
One of those films which is infamous for the censorship scandal surrounding it more than anything else, whilst being actually quite good. Wikipedia describes it as a 'historical horror', - this is horror grounded in appalling human evil and religious persecution more than the actual demonic possession of contemporaneous films. Oliver Reed and Vanessa Redgrave turn in great performances. Had to torrent this one as it's near-unavailable, which lumped me with a virus for a week. It was ALMOST worth it though.
edit: Also watched the first two
Mad Max films in a day. The original felt awfully familiar and considering its reputation as a post-apocalyptic sci-fi landmark it didn't have that feel... until the second which has an vastly inflated budget, great cinematography and exhibited all the cliches we have come to associate with Mad Max: REALLY desolate landscapes, cabaret leather punk hitmen riding modified dune buggies and swinging chains around, a prologue about some devastating nuclear war...
The first was pure revenge titillation on a micro-budget but all the more resourceful and fun for that reason; the second fleshes out everything you expect from the popular Mad Max image. You just can't argue with that final car chase. From what I have read the series went to s
hit when they took Max off the road, which I can well imagine because there is not an awful lot else going for it.